BioMedical Admissions Test (BMAT) Practice Test 2026 - Free BMAT Practice Questions and Study Guide

Question: 1 / 400

What color is the precipitate produced when dilute nitric acid is added to I- ions?

Brown

Cream

Colorless

Yellow

When dilute nitric acid is added to I- ions, the reaction leads to the formation of iodine. Iodine, in its solid form, creates a yellow precipitate known as iodine crystals. Therefore, the correct answer relating to the color of the precipitate produced is yellow.

In contrast, the other colors mentioned do not correspond to the precipitate formation of iodine. A brown color typically relates to other compounds or reactions, such as the formation of iron(III) ions, cream often refers to lead(II) iodide, which is not the case here, and colorless would suggest the absence of a noticeable precipitate, which is not accurate for iodine. Hence, the specific reaction between dilute nitric acid and I- ions that leads to a yellow precipitate is significant.

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